<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<meta http-equiv="X-UA-Compatible" content="ie=edge" />
		<title>03.下拉菜单</title>
		<style>
			* {
				margin: 0;
				padding: 0;
				font: 30px / 90px "微软雅黑";
			}
			
			ul {
				list-style: none;
			}
			
			.wrap {
				width: 1000px;
				height: 1000px;
				position: absolute;
				left: 50%;
				top: 50%;
				margin-top: -500px;
				margin-left: -500px;
				background: url(./images/dropDownMenu/bg.jpg) no-repeat;
			}
			
			.menu {
				width: 330px;
				border-radius: 10px;
				overflow: hidden;
				margin-top: 285px;
				margin-left: 335px;
				background: #f87a75;
				box-shadow: 0 20px 50px rgba(248, 122, 117, .5);
			}
			
			.title {
				height: 90px;
				padding-left: 112px;
				box-sizing: border-box;
				color: #fff;
				position: relative;
			}
			
			.title::after {
				content: '';
				position: absolute;
				right: 36px;
				top: 41px;
				background: url(./images/dropDownMenu/ar.png) no-repeat;
				width: 28px;
				height: 16px;
			}
			
			.list {
				width: 316px;
				padding-left: 7px;
				padding-bottom: 5px;
				display: none;
			}
			
			.list li {
				height: 90px;
				margin-bottom: 2px;
				background: #fee4e3;
				border-radius: 20px;
				padding-left: 112px;
				box-sizing: border-box;
				background-position: 23px 24px;
				background-repeat: no-repeat;
			}
			
			.list li:hover {
				background-color: #fff;
				box-shadow: 0 0 50px rgba(248, 122, 117, 0.93);
				position: relative;
			}
			
			.list li:nth-of-type(1) {
				background-image: url(./images/dropDownMenu/icon1.png);
			}
			
			.list li:nth-of-type(2) {
				background-image: url(./images/dropDownMenu/icon2.png);
			}
			
			.list li:nth-of-type(3) {
				background-image: url(./images/dropDownMenu/icon3.png);
			}
			
			.list li:nth-of-type(4) {
				background-image: url(./images/dropDownMenu/icon4.png);
			}
			
			.list li:nth-of-type(5) {
				background-image: url(./images/dropDownMenu/icon5.png);
			}
		</style>
		<script>
			window.onload = function () {
				var oBtn = document.querySelectorAll(".title")[0];
				var oList = document.querySelectorAll(".list")[0];
				// 准备一个开关，控制显示隐藏  true - 显示  false - 隐藏
				var onOff = true;
				
				oBtn.addEventListener("click", function () {
					if ( onOff ) {
						oList.style.display = "block";
						// onOff = false;
					} else {
						oList.style.display = "none";
						// onOff = true;
					}
					
					onOff = !onOff;
				}, false);
				
			};
		</script>
	</head>
	<body>
		 <div class="wrap">
	        <div class="menu">
	            <div class="title">菜单</div>
	            <ul class="list">
	                <li>微博</li>
	                <li>图片</li>
	                <li>博客</li>
	                <li>视频</li>
	                <li>更多>></li>
	            </ul>
	        </div>
	    </div>	
	</body>
</html>